1、 毕业设计(论文)计算书 220kV变电站设计 摘 要 变电站是联系发电厂和用户的中间环节,起着变换和分 配电能的作用。随着系统容量迅速增大,变电站发生事故影 响越大,变电站的合理设计越显重要。 本文设计了 220kV 变电站的电气一次、二次部分。对设 计资料及变电站的总体分析,拟定多种电气主接线的方案, 通过经济技术比较确定本次设计电气主接线最佳方案。依据 规程规定以及最初设计资料的数据,确定主变压器的容量及 型号,为短路电流的计算提供最初的电路参数。按照电气设 备选择的原则,确定此变电站中所安装断路器、隔离开关、 电流互感器、电压互感器以及母线的型号,根据型号查出相 关技术数据,并逐一具体
2、分析校验电器以满足运行的要求。 最后选择了与一次设备相应的继电保护设备。 本文设计是针对生产实践,通过分析、计算、比较和论 证等设计步骤完成了变电所电气一次、二次部分的设计,满 足变电站供电的可靠性、安全性以及远期负荷需求。 关键词:变电站 电气主接线 设备选型 毕业设计(论文)计算书 A 220kV Substation design Student:XiaoFeng Supervisor:XXX Abstracts Substations are the intermediate links between power plants and users , playing a role o
3、f power transformation and distribution. As the system capacity increases rapidly,accidents of substations affect greatly,which makes reasonable designs of substations much more important. In this paper, electrical primary and secondary parts of a 220KV substation are designed. By a general analysis
4、 of the design data and the substation, several schemes of the main electrical connection is studied out,and the best scheme is determined by economic and technical analysis.Then,according to regulations and the original design data, capacity and type of the main transformer,providing initial circuit parameters for short-circuit current calculation. Based on the principles of electrical equipment selection, the types of circuit breakers,disconnectors,current tran